The blue Tubifast is about 7cm in diameter, and the green is 3.5cm. I have some left over, so I'm selling them. They can be washed and reused. How about trying them out? The box has some folds, but the Tubifast itself is unused and clean because I cut it to use. Please be aware that this item has been stored at home. *When shipping, I will flatten the box to reduce shipping costs. The Tubifast will be placed in a new plastic bag.